CN101058822A - Method of extracting rice bran polysaccharide and rice bran protein - Google Patents
Method of extracting rice bran polysaccharide and rice bran protein Download PDFInfo
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- CN101058822A CN101058822A CN 200710052196 CN200710052196A CN101058822A CN 101058822 A CN101058822 A CN 101058822A CN 200710052196 CN200710052196 CN 200710052196 CN 200710052196 A CN200710052196 A CN 200710052196A CN 101058822 A CN101058822 A CN 101058822A
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Abstract
The invention discloses a rice bran polysaccharide and the extraction method of rice bran protein, which comprises the following steps: getting rice bran degreasing draff powder after disintegrating rice bran degreasing draff; adding water and aqueous alkali in the rice bran degreasing draff powder; dealing with hypersonic, mixing and extracting 10-180 minutes in 50Deg. C-80Deg. C bath temperature after homogenate; centrifugalizing after the extraction; disposing residues; getting extract of the rice bran polysaccharide and the rice bran protein; adjusting pH 4. 1-4. 5 after hydrolyzing starch with amylase in the extract; depositing protein; centrifugalizing; getting supernatant with rice bran polysaccharide and protein deposition; collecting protein deposition; getting rice bran protein product after drying. The invention improves the extraction rate of the rice bran polysaccharide and the rice bran protein effectively.
Description
Technical field
The present invention relates to the extracting method of a kind of rice bran polysaccharide and rice bran protein, belong to active skull cap components extractive technique field.
Background technology
China is rice main product state, the rice bran aboundresources.The rice bran degreasing dregs of rice are the main byproducts after rice bran extracts grease, and its utilization at present is mainly animal-feed, and value of the product is low.Be rich in polysaccharide and albumen in the rice bran.Rice bran polysaccharide has physiologically actives such as the immunological competence of raising, and rice bran protein has characteristics such as nutritive value absorbs entirely, easily.Hot water extraction method or potass extraction method are generally adopted in the extraction of rice bran polysaccharide, potass extraction or enzymic hydrolysis extraction method are generally adopted in the extraction of rice bran protein, because compositions such as the fiber in rice bran polysaccharide and rice bran protein and the rice bran, starch exist and combine closely, therefore it is not high all to exist extraction efficiency at present in rice bran polysaccharide and rice bran protein extraction, and raw rice bran is utilized problems such as insufficient.
Summary of the invention
The object of the present invention is to provide the extracting method of a kind of rice bran polysaccharide and rice bran protein, this method can obtain rice bran polysaccharide and rice bran protein product by once extracting under comparatively gentle condition, and its extraction yield is effectively improved.
For achieving the above object, the technical solution used in the present invention is: get rice bran degreasing dregs of rice powder after the rice bran degreasing dregs of rice are pulverized, the extracting method of rice bran polysaccharide and rice bran protein, the strong alkali aqueous solution that to add 10～20 liters of concentration in per kilogram rice bran degreasing dregs of rice powder be 0～0.1mol/L, homogenate is 60～300 seconds under 10000 rev/mins～20000 rev/mins rotating speed; Under 50 ℃～80 ℃ bath temperatures, supersound process stirs simultaneously extracted ultrasonic power 40～100W 10～180 minutes then; Carry out centrifugation after extracting end, discard residue, obtain containing the extracting solution of rice bran polysaccharide and rice bran protein, regulating pH behind the adding amylorrhexis starch in extracting solution is 4.1～4.5, protein precipitation, centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide; Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1～3 times of concentrated solution volume amount, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.
Perhaps, will get rice bran degreasing dregs of rice powder after the pulverizing of the rice bran degreasing dregs of rice, add 10～20 liters of concentration in the per kilogram rice bran degreasing dregs of rice powder strong alkali aqueous solution that is 0～0.1mol/L, homogenate is 60～300 seconds under 10000 rev/mins～20000 rev/mins rotating speed; Under 50 ℃～80 ℃ bath temperatures, supersound process stirs simultaneously extracted ultrasonic power 40～100W 10～180 minutes then; After extracting, ultrasonic agitation extracted 0～170 minute 50 ℃～80 ℃ stirred in water bath again; Carry out centrifugation after extracting end, discard residue, obtain containing the extracting solution of rice bran polysaccharide and rice bran protein, regulating pH behind the adding amylorrhexis starch in extracting solution is 4.1～4.5, protein precipitation, centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide; Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1～3 times of concentrated solution volume amount, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.
The present invention is the most well 60～80 mesh sieves after the rice bran degreasing dregs of rice are pulverized.
Described alkali aqueous solution is aqueous sodium hydroxide solution or potassium hydroxide aqueous solution.
The raw material that adopts among the present invention is the rice bran degreasing dregs of rice, is the main byproduct after rice bran extracts the rice bran grease.The rice bran degreasing dregs of rice are fully destroyed the cell tissue structure of rice bran meal through adding after the water high-speed homogenization is handled, under the ultrasonic wave subsidiary conditions, extract then, ultrasonication can effectively interrupt mutually combining between the compositions such as rice bran polysaccharide, rice bran protein, starch, fiber, thereby effectively improves the extraction efficiency of rice bran polysaccharide and rice bran protein.By this technology, can obtain rice bran polysaccharide and two kinds of products of rice bran protein simultaneously by once extracting, and extraction conditions is relatively gentleer, the product proterties is good.Rice bran residue after the extraction also can continue to use as animal-feed.
The present invention can make about the extraction rate reached to 1.2% of rice bran polysaccharide, about the extraction rate reached to 2% of rice bran protein.
Wherein:
Embodiment
Embodiment 1: rice bran degreasing dregs of rice raw material (in emerging energy technology (Hubei) company limited provide) is provided, after pulverizing 60 mesh sieves, the water that adds 10 times of rice bran degreasing dregs of rice volumes, homogenate is 60 seconds under 10000 rev/mins of rotating speeds, extract 50 ℃ of stirred in water bath then, and at first ultrasonic-assisted extraction is 10 minutes, and ultrasonic power 40W continues to stir after ultrasonication finishes and extracted 170 minutes.The extraction back centrifugation that finishes, supernatant liquor add that to regulate pH with dilute hydrochloric acid behind the amylorrhexis starch be 4.1, protein precipitation, and centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide.Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1 times of amount of concentrated solution volume, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.By this operation, the extraction yield of rice bran polysaccharide is 0.68%, and the extraction yield of rice bran protein is 1.2%.
Embodiment 2, get rice bran degreasing dregs of rice raw material (available from Suihua City Wanyuan grease company limited), after pulverizing 80 mesh sieves, the concentration that adds 20 times of rice bran degreasing dregs of rice volumes is the aqueous sodium hydroxide solution of 0.1mol/L, and homogenate was stirred 300 seconds under 20000 rev/mins rotating speed.In 80 ℃ of water-baths, stir under the ultrasonic wave condition then and extracted ultrasonic power 100W 180 minutes.The extraction back centrifugation that finishes discards residue, obtains containing rice bran polysaccharide and proteic extracting solution, adds in extracting solution that to regulate pH behind the amylorrhexis starch be 4.5, protein precipitation, and centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide.Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 3 times of amounts of concentrated solution volume, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.By this operation, the extraction yield of rice bran polysaccharide is 1.21%, and the extraction yield of rice bran protein is 2.2%.
Embodiment 3, get rice bran degreasing dregs of rice raw material (available from Deyang grain and oil factory of the graceful grain and oil of Sichuan moral company limited), after pulverizing 70 mesh sieves, the concentration that adds 15 times of rice bran degreasing dregs of rice volumes is the potassium hydroxide aqueous solution of 0.05mol/L, and homogenate was stirred 180 seconds under 15000 rev/mins rotating speed.In 60 ℃ of water-baths, stir under the ultrasonic wave condition then and extracted 30 minutes, ultrasonic power 60W, supersound process finishes the back and continues to stir in 60 ℃ of water-baths to extract 150 minutes.The extraction back centrifugation that finishes discards residue, obtains containing rice bran polysaccharide and proteic extracting solution, adds in extracting solution that to regulate pH behind the amylorrhexis starch be 4.2, protein precipitation, and centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide.Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 2 times of amounts of concentrated solution volume, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.By this operation, the extraction yield of rice bran polysaccharide is 1.21%, and the extraction yield of rice bran protein is 2.2%.
Embodiment 4, get rice bran degreasing dregs of rice raw material (available from Jiangsu Xinghua City south booth vegetable oil mill), and the concentration of pulverizing 15 times of rice bran degreasing dregs of rice volumes of back adding is the aqueous sodium hydroxide solution of 0.05mol/L, and homogenate was stirred 300 seconds under 20000 rev/mins rotating speed.In 80 ℃ of water-baths, stir under the ultrasonic wave condition then and extracted ultrasonic power 80W 180 minutes.The extraction back centrifugation that finishes discards residue, obtains containing rice bran polysaccharide and proteic extracting solution, adds in extracting solution that to regulate pH behind the amylorrhexis starch be 4.5, protein precipitation, and centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide.Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 3 times of amounts of concentrated solution volume, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.By this operation, the extraction yield of rice bran polysaccharide is 0.78%, and the extraction yield of rice bran protein is 1.4%.
Embodiment 5, and rice bran degreasing dregs of rice raw material (in emerging energy technology (Hubei) company limited provide) is provided, and pulverize the water that the back adds 20 times of rice bran degreasing volumes, and homogenate was stirred 150 seconds under 20000 rev/mins rotating speed.In 70 ℃ of water-baths, stir under the ultrasonic wave condition then and extracted ultrasonic power 40W 60 minutes.The extraction back centrifugation that finishes discards residue, obtains containing rice bran polysaccharide and proteic extracting solution, adds in extracting solution that to regulate pH behind the amylorrhexis starch be 4.2, protein precipitation, and centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide.Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1 times of amount of concentrated solution volume, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.By this operation, the extraction yield of rice bran polysaccharide is 0.48%, and the extraction yield of rice bran protein is 0.92%.
Embodiment 6, and rice bran degreasing dregs of rice raw material (in emerging energy technology (Hubei) company limited provide) is provided, and pulverize the water that the back adds 20 times of rice bran degreasing volumes, and homogenate was stirred 150 seconds under 20000 rev/mins rotating speed.In 60 ℃ of water-baths, stir under the ultrasonic wave condition then and extracted 10 minutes, ultrasonic power 60W, supersound process finishes the back and continues to stir in 60 ℃ of water-baths to extract 170 minutes.The extraction back centrifugation that finishes discards residue, obtains containing rice bran polysaccharide and proteic extracting solution, adds in extracting solution that to regulate pH behind the amylorrhexis starch be 4.2, protein precipitation, and centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide.Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1 times of amount of concentrated solution volume, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.By this operation, the extraction yield of rice bran polysaccharide is 1.1%, and the extraction yield of rice bran protein is 5.6%.
Claims (6)
1. the extracting method of rice bran polysaccharide and rice bran protein, it is characterized in that, to get rice bran degreasing dregs of rice powder after the pulverizing of the rice bran degreasing dregs of rice, the strong alkali aqueous solution that to add 10～20 liters of concentration in per kilogram rice bran degreasing dregs of rice powder be 0～0.1mol/L, homogenate is 60～300 seconds under 10000 rev/mins～20000 rev/mins rotating speed; Under 50 ℃～80 ℃ bath temperatures, supersound process stirs simultaneously extracted ultrasonic power 40～100W 10～180 minutes then; Carry out centrifugation after extracting end, discard residue, obtain containing the extracting solution of rice bran polysaccharide and rice bran protein, regulating pH behind the adding amylorrhexis starch in extracting solution is 4.1～4.5, protein precipitation, centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide; Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1～3 times of concentrated solution volume amount, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.
2. the extracting method of rice bran polysaccharide according to claim 1 and rice bran protein is characterized in that: pulverize the back at the rice bran degreasing dregs of rice and cross 60～80 mesh sieves.
3. the extracting method of rice bran polysaccharide according to claim 1 and 2 and rice bran protein is characterized in that: described alkali aqueous solution is aqueous sodium hydroxide solution or potassium hydroxide aqueous solution.
4. the extracting method of rice bran polysaccharide and rice bran protein, it is characterized in that, to get rice bran degreasing dregs of rice powder after the pulverizing of the rice bran degreasing dregs of rice, the strong alkali aqueous solution that to add 10～20 liters of concentration in per kilogram rice bran degreasing dregs of rice powder be 0～0.1mol/L, homogenate is 60～300 seconds under 10000 rev/mins～20000 rev/mins rotating speed; Under 50 ℃～80 ℃ bath temperatures, supersound process stirs simultaneously extracted ultrasonic power 40～100W 10～180 minutes then; After extracting, ultrasonic agitation extracted 0～170 minute 50 ℃～80 ℃ stirred in water bath again; Carry out centrifugation after extracting end, discard residue, obtain containing the extracting solution of rice bran polysaccharide and rice bran protein, regulating pH behind the adding amylorrhexis starch in extracting solution is 4.1～4.5, protein precipitation, centrifugation obtains containing the supernatant liquor and the albumen precipitation of rice bran polysaccharide; Collect albumen precipitation, get the rice bran protein product after the drying; The supernatant liquor concentrating under reduced pressure that contains rice bran polysaccharide gets concentrated solution, adds the dehydrated alcohol precipitation rice bran polysaccharide of 1～3 times of concentrated solution volume amount, collects the polysaccharide precipitation after drying, obtains the rice bran polysaccharide product.
5. the extracting method of rice bran polysaccharide according to claim 4 and rice bran protein is characterized in that: pulverize the back at the rice bran degreasing dregs of rice and cross 60～80 mesh sieves.
6. according to the extracting method of claim 4 or 5 described rice bran polysaccharides and rice bran protein, it is characterized in that: described alkali aqueous solution is aqueous sodium hydroxide solution or or potassium hydroxide aqueous solution.
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